Trolley-wheel.



No. 675,142. Patented May 28, |90I. H. W. SMITH.

TRULLEY WHEEL.

(Application led Mar. 6, 1901.\

(No Model.)

UNITED STATES PATENT OFFICE.

HERBERT W. SMITII, OF MEDFORD, MASSACHUSETTS, ASSIGNOR OF ONE- HALF TOARTHUR W. FIELD, OF BOSTON, MASSACHUSETTS.

TRoLLEY-WHEEL.

SPECIFICATION forming part 0f Letters Patent N0. 675,142, dated May 28,1901.

Application tiled March 6, 1901.

To all whom it may concern,.-

Be it known that I, HERBERT W. SMITH, a citizen of the United States,residing in Medford, inthe county of Middlesex and State ofMassachusetts, have invented a new and useful Improvement inTrolley-Wheels, of which the following is a specification.

This invention relates to the construction of trolley-wheels forelectrically-propelled cars and other vehicles; and it has for itsprincipal object to prevent the formation of arcs when the wire slidesor jumps from the flange to the body, or vice versa, such arcing i'njuring both the trolley-wheel and the wire by pitting-in-that is,producing small holes or recesses in the wheel or wire.

In this invention I provide the inner surfaces of the iiangeswithlinings of-cotton fiber or other non-conductive material, saidlinings extending from the main body or tread of the wheel to a line ata little distance from the extreme edge of. the ange, whereby the rim ofthe flange is of exposed metal and allows the wheel when rolling underfrogs or switches to secure contact at such localities.

The nature of the invention is fully described in detail below andillustrated in the accompanyingdrawings, in which- Figure l is aperspective view of a trolleywheel embodying my invention. Fig. 2 is acentral cross-section of the same, showing the wire in position. Figs. 3and 4 are similar sections of the linings to the opposite iiangesremoved.

Similar letters of reference indicate corresponding parts.

a o.' represent the two portions which when screwed together, asshown,constitute the hub of the Wheel, and b is a journal-sleeve.

C is the main portion or body of the wheel, formed with the usualgroove-shaped tread on its periphery and made of metal.

D D are metallic Iianges on opposite sides of the main portion C andconnected with thc hub a, and said main portion at their inner edges orparts D'. These metallic flanges are formed at Dl with shoulders wherebytheir main portions are offset from the central portion C of the wheeland are flared, as shown at D'", and formed inward at their2outer edgesinto the annular `hook-shaped portions D.

` sean No. 50,020. (no man.)

On each side of the main portion C of the wheel an annular lining ofcotton ber or other non-conductive material is placed against the innersurface of the flange D, such non-conductive lining consisting of themain portion E, which lies in the annular recess formed between theflange and the portion C of the wheel above the shoulder D, and of theportion E', which lines the exposed inner surface of the iiange and isprovided at its periphery with the outwardlyformed extension E, whichlies in the annular recess provided by the hook-shaped portion'D. Itwill thus be seen that the inner surfaces of the metallic anges beyondthe main portion of the wheel are lined with and protected by anon-conductive material, which is securely locked in position by theshape of the flanges, but that said flanges at their outer edges areformed with bare inner surfaces. Hence when the wire leaves the tread ormain portion of the wheel it comes in contact with the non-conductivelining, and no arc'ing is possible, and hence no injury to the wheel orWire by pitting-in; but when the wheel rolls under frogs or switches theWire can mount the flanges to their unprotected edges D" and secureelectrical contact.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is

1. A trolley-wheel comprising a main or body portion a hub; oppositeiianges extending beyond said body portion, said hub, body portion andanges being constructed of metal; and annular linings of non-conductivematerial on the inner surfaces of said flanges, substantially asdescribed.

2. A trolley-wheel comprising a main or body portion; a hub; oppositeflanges extending beyond said body portion, said hub, body portion andflanges being constructed of metal g, and annular linings ofnon-conductive material on the inner surfaces of said flanges, each saidlining extending from the body portion of the wheel to a line at a shortdistance from the outer edge of the flange against which it is laid,substantially as set forth.

3. A trolley-wheel comprising a metallic main or body portion; ametallic hub 5 metallic ilanges extending from saidhub and body IOOportion and set ed from the opposite surfaces of the latter and formedinwardly at their outer edges or peripheries into hook-shaped portions;and annular linings of non-conductive material laid against the innerfaces of the flanges and held in place at their outer edges by the shapeof said flanges, substantially as described.

4. The herein-described improved trolley- Wheel consisting of the hub;the main or body portion C; the metallic iianges D provided with theinner portions D', shoulders D, flanged portions'D" and hook-shapedportions D"; and the linings of non-conductive inaterial, comprising theportions E lying be- 15 tween the flanges and the body of the Wheel, theportions E against the inner faces of the anges and the portions E"extending into the recesses formed bythe portions D" of the flanges,substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence oi two subscribing Witnesses.

HERBERT W. SMITH.

Vitnesses:

HENRY W. WILLIAMS, A. N. BONNEY.

